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Author Francis-Smith, K.; Wood-Gush, D.G.M.
Title Copropgagia as seen in thoroughbred foals Type Journal Article
Year 1977 Publication Equine veterinary journal Abbreviated Journal Equine Vet J
Volume 9 Issue 3 Pages 155-157
Keywords animal; article; coprophagy; defecation; eating; female; horse; horse disease; human; mastication
Abstract Four Thoroughbred foals were seen to quickly eat part of the faeces deposited by their own dams on some 40 per cent of the mare-defaecating occasions observed between the second and fifth week after birth. They did not do it before or after this period. This behaviour was thought to be a feeding pattern which formed a normal part of the foal's development.
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Notes from Professor Hans Klingels Equine Reference List Approved no
Call Number (up) Serial 1090
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Author McDonnell, S.M.; Henry,M. Bristol, F.
Title Spontaneous erection and masturbation in equids Proc 35th Type Journal Article
Year 1991 Publication Abbreviated Journal J. Reprod. Fert. Suppl
Volume 44 Issue Pages 664-665
Keywords Horse; Masturbation; Erection; Aversive conditioning; Sexual behavior; Ejaculation; Semen
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Notes This paper is part of the special issue entitled “Proceedings of the 4th International Symposium on Stallion Reproduction”, Guest Edited by Dr. Edward Squires. Approved no
Call Number (up) Serial 1378
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Author Dougherty, D.M.; Lewis, P.
Title Stimulus generalization, discrimination learning, and peak shift in horses Type Journal Article
Year 1991 Publication Journal of the experimental analysis of behavior Abbreviated Journal J Exp Anal Behav
Volume 56 Issue 1 Pages 97-104
Keywords Animals; *Appetitive Behavior; Attention; *Conditioning, Operant; *Discrimination Learning; Female; *Generalization, Stimulus; Horses/*psychology; Male; *Pattern Recognition, Visual; Size Perception
Abstract Using horses, we investigated three aspects of the stimulus control of lever-pressing behavior: stimulus generalization, discrimination learning, and peak shift. Nine solid black circles, ranging in size from 0.5 in. to 4.5 in. (1.3 cm to 11.4 cm) served as stimuli. Each horse was shaped, using successive approximations, to press a rat lever with its lip in the presence of a positive stimulus, the 2.5-in. (6.4-cm) circle. Shaping proceeded quickly and was comparable to that of other laboratory organisms. After responding was maintained on a variable-interval 30-s schedule, stimulus generalization gradients were collected from 2 horses prior to discrimination training. During discrimination training, grain followed lever presses in the presence of a positive stimulus (a 2.5-in circle) and never followed lever presses in the presence of a negative stimulus (a 1.5-in. [3.8-cm] circle). Three horses met a criterion of zero responses to the negative stimulus in fewer than 15 sessions. Horses given stimulus generalization testing prior to discrimination training produced symmetrical gradients; horses given discrimination training prior to generalization testing produced asymmetrical gradients. The peak of these gradients shifted away from the negative stimulus. These results are consistent with discrimination, stimulus generalization, and peak-shift phenomena observed in other organisms.
Address Department of Psychology, Ohio University, Athens 45701
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ISSN 0022-5002 ISBN Medium
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Notes PMID:1940765 Approved no
Call Number (up) Serial 1764
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Author Rapin, V.; Poncet, P.A.; Burger, D.; Mermod, C.; Richard, M.A.
Title [Measurement of the attention time in the horse] Type Journal Article
Year 2007 Publication Schweizer Archiv fur Tierheilkunde Abbreviated Journal Schweiz Arch Tierheilkd
Volume 149 Issue 2 Pages 77-83
Keywords Age Factors; Animals; *Attention/physiology; Conditioning, Operant; Cross-Over Studies; Female; Horses/*physiology; Learning/*physiology; Male; Memory/*physiology; Time Factors
Abstract A study carried out on 49 horses showed that it is possible to measure the attention time by operant conditioning. After teaching horses an instrumental task using a signal, we were then able to test their attention time by asking them to prolong it increasingly while setting success and failure criteria. Two tests were performed 3 weeks apart. The 2nd test was feasible without relearning, a proof of memory, and was repeatable, a proof of consistency in the attention time. A significant difference was observed between the 3 age groups. Young horses often performed very well during the 1st test but their attention dropped in the 2nd test while older horses were more stable with respect to attention and even increased it slightly. The study shows that there are individual differences but it was not possible to prove a significant influence of breed, gender and paternal influence. Consequently, learning appears to be one of the most interesting approaches for evaluating the attention of horses and for observing their behaviour.
Address Laboratoire d'Ecoethologie, Universite de Neuchatel, Suisse. veronique.rapin@unine.ch
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Language French Summary Language Original Title Mesure de la duree d'attention chez le cheval
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ISSN 0036-7281 ISBN Medium
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Notes PMID:17343134 Approved no
Call Number (up) Serial 1770
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Author Zehnder, A.M.; Ramer, J.C.; Proudfoot, J.S.
Title The use of altrenogest to control aggression in a male Grant's Zebra (Equus burchelli boehmi) Type Journal Article
Year 2006 Publication Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians Abbreviated Journal J Zoo Wildl Med
Volume 37 Issue 1 Pages 61-63
Keywords Aggression/*drug effects; Animals; Animals, Zoo; Behavior, Animal/*drug effects; Dose-Response Relationship, Drug; Equidae/*physiology; Female; Horses; Male; Treatment Outcome; Trenbolone/*analogs & derivatives/therapeutic use
Abstract A male Grant's Zebra (Equus burchelli boehmi) housed with two mares at the Indianapolis Zoo had a 9-yr history of intermittent aggressive behavior toward mares and other animals. Periods of separation allowed the mares time to heal after sustaining superficial bite wounds. On 26 March 2003, the male (890293) was started on altrenogest at a dosage of 19.8 mg orally once daily to allow reintroduction. The dosage was doubled (40 mg once a day) because of a perceived lack of response. Reintroduction to the mares occurred on 17 May 2003 with no signs of aggression noted. Treatment was reduced to 19.8 mg orally once a day and then discontinued. Altrenogest was restarted at 39.5 mg orally once a day because of the planned introduction of a new mare. There have been no major aggressive displays at this dosage of altrenogest and the dosage has recently been reduced following successful introduction of a new mare.
Address University of Florida, 2015 SW 16th Street, Gainesville, Florida 32610, USA
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ISSN 1042-7260 ISBN Medium
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Notes PMID:17312816 Approved no
Call Number (up) Serial 1772
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Author Robinson, H.C.
Title Equine interspecies aggression Type
Year 2007 Publication The Veterinary record Abbreviated Journal Vet. Rec.
Volume 160 Issue 7 Pages 244
Keywords *Aggression; Animals; Behavior, Animal; Equidae; Horses/*physiology/*psychology
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ISSN 0042-4900 ISBN Medium
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Notes PMID:17308028 Approved no
Call Number (up) Serial 1773
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Author van Heel, M.C.V.; Kroekenstoel, A.M.; van Dierendonck, M.C.; van Weeren, P.R.; Back, W.
Title Uneven feet in a foal may develop as a consequence of lateral grazing behaviour induced by conformational traits Type Journal Article
Year 2006 Publication Equine veterinary journal Abbreviated Journal Equine. Vet. J.
Volume 38 Issue 7 Pages 646-651
Keywords Aging/*physiology; Animals; Animals, Newborn/anatomy & histology/growth & development/physiology; Feeding Behavior/*physiology; Female; Forelimb/*anatomy & histology/*physiology; *Horses/anatomy & histology/growth & development/physiology; Male
Abstract REASONS FOR PERFORMING STUDY: Conformational traits are important in breeding, since they may be indicative for performance ability and susceptibility to injuries. OBJECTIVES: To study whether certain desired conformational traits of foals are related to lateralised behaviour while foraging and to the development of uneven feet. METHODS: Twenty-four Warmblood foals, born and raised at the same location, were studied for a year. Foraging behaviour was observed by means of weekly 10 min scan-sampling for 8 h. A preference test (PT) was developed to serve as a standardised tool to determine laterality. The foals were evaluated at age 3, 15, 27 and 55 weeks. The PT and distal limb conformation were used to study the relation between overall body conformation, laterality and the development of uneven feet. Pressure measurements were used to determine the loading patterns under the feet. RESULTS: About 50% of the foals developed a significant preference to protract the same limb systematically while grazing, which resulted in uneven feet and subsequently uneven loading patterns. Foals with relatively long limbs and small heads were predisposed to develop laterality and, consequently unevenness. CONCLUSIONS: Conformational traits may stimulate the development of laterality and therefore indirectly cause uneven feet.
Address Derona Equine Performance Laboratory, Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 12, NL-3584 CM Utrecht, The Netherlands
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ISSN 0425-1644 ISBN Medium
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Notes PMID:17228580 Approved no
Call Number (up) Serial 1774
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Author Scheibe, K.M.; Gromann, C.
Title Application testing of a new three-dimensional acceleration measuring system with wireless data transfer (WAS) for behavior analysis Type
Year 2006 Publication Behavior research methods Abbreviated Journal Behav Res Methods
Volume 38 Issue 3 Pages 427-433
Keywords Acceleration; Animals; *Behavior, Animal; Cattle; Cattle Diseases/*diagnosis; Computer Communication Networks/*instrumentation; Forelimb/physiopathology; Fractals; Hindlimb/physiopathology; Horse Diseases/*diagnosis; Horses; Imaging, Three-Dimensional/instrumentation/methods/veterinary; Lameness, Animal/*diagnosis; Monitoring, Ambulatory/instrumentation/*methods; Motor Activity; Movement; Pattern Recognition, Automated/methods
Abstract A wireless acceleration measurement system was applied to free-moving cows and horses. Sensors were available as a collar and a flat box for measuring leg or trunk movements. Results were transmitted simultaneously by radio or stored in an 8-MB internal memory. As analytical procedures, frequency distributions with standard deviations, spectral analyses, and fractal analyses were applied. Bymeans of the collar sensor, basic behavior patterns (standing, grazing, walking, ruminating, drinking, and hay uptake) could be identified in cows. Lameness could be detected in cows and horses by means of the leg sensor. The portion of basic and harmonic spectral components was reduced; the fractal dimension was reduced. The system can be used for the detection and analysis of even small movements of free-moving humans or animals over several hours. It is convenient for the analysis of basic behaviors, emotional reactions, or events causing flight or fright or for comparing different housing elements, such as floors or fences.
Address Institute for Zoo and Wildlife Research, Berlin, Germany. kscheibe@izw-berlin.de
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ISSN 1554-351X ISBN Medium
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Notes PMID:17186752 Approved no
Call Number (up) Serial 1775
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Author Huxley, J.
Title Equine interspecies aggression Type
Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.
Volume 159 Issue 25 Pages 860
Keywords *Aggression; Animals; *Behavior, Animal; Horses; Male; Sheep
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Notes PMID:17172489 Approved no
Call Number (up) Serial 1776
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Author Macholc, E.J.A.
Title Equine interspecies aggression Type
Year 2006 Publication The Veterinary record Abbreviated Journal Vet. Rec.
Volume 159 Issue 24 Pages 824
Keywords *Aggression; Animals; *Behavior, Animal; Chickens; Ducks; *Horses; Species Specificity
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Notes PMID:17158722 Approved no
Call Number (up) Serial 1778
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